How do these connectors work that plug into the back of the Data Logger?

The black connectors that plug into the back of the data logger have a latching mechanism inside. It works like an air hose chuck. Hold the cable in one hand and pull back on the black collar of the connector as you push the connector into the logger, then release. This locks the connector and prevents it from loosing up from vibration.

Which RPM cable goes where?

The Engine RPM cable is the black cable in the RPM cable harness. There is a pigtail for the Engine RPM cable with a green and black wire. The green wire connects to the “Tach” output in your ignition box, and the black wire connects to the same spot as your ignition box ground. The driveshaft RPM cable is the gray cable in the RPM cable harness.

How do I wire up the PWR/REC cable?

The “power/record” cable provides DC power and ground to the DL Data Logger and also has the remote start switch connection. The red and black wires are for power and ground. The red wire should be connected through a 1-2 amp fuse to 12 volt power. The DL10 will work fine on voltages from 10 – 18 volts, so 16 volt racing batteries are not a problem. It is advisable to turn off the data logger while charging 16 volt batteries since the charging voltage may go above 20 volts. The black wire is the ground for the DL 10 data logger and should be connected to battery ground.

Also in the PWR/REC cable assembly is a short “pigtail” with the white two pin connector. This is for the remote start switch if you want to use one. If you ordered the remote start cable and switch (PN# RPM-DRSS), you will have a 15 foot extension cable with a mating connector for the pigtail, and a momentary toggle switch. If you choose to make up your own remote start switch, use a normally open, momentary switch, connected to the two wires in the pigtail. The connector is a standard .062 Molex type, and is usually stocked at Radio Shack or electronic supply shops.

What USB to Serial Converter should I buy?

Most of today’s laptops don’t have a serial port. In order to connect your computer to the DL10 Data Logger you will need a serial to USB adapter. We recommend using the IOGEAR #GUC232A USB to Serial Adapters which retail around $25. This handy low cost adapter works great to connect to the DL10 and to the MSD Digital 7 series ignition boxes such as the MSD7531. One additional benefit to this particular model it that Windows 7 typically will recognize this adapter and load the drivers for it from the Internet. Which is very handy in case you lose the driver CD, or you can’t get to the driver disk when using it on a different machine. It’s typically a plug it in and go device.

I already have a pressure sensor, can I use it with the DL10?

The DL10 Data Logger uses 0-5 volt inputs for it’s analog channels. The Analog cable assembly has three colored wires and an uninsulated shield drain wire. The red wire is 5 volt power and is limited to 20mA of drive current. The white wire is the signal (0-5volts), and the black is ground. Don not connect the shield wire at the sensor end of the cable.

The standard pin connection is Pin 1 red, Pin 2 Green and Pin 3 Black. Do not use sensors that require more than 20mA drive current or you may damage the data logger.

Why are your EGT Thermocouples straight and how do you install them?

Our thermocouples are shipped straight so that you can bend them to fit your application. They are available with either 1/4″ or 3/16″ fittings, so be sure to specify what size your header bungs are when you order.

When you install the thermocouple probe you have to set the probe depth for your specific application.

  • If entering on the top side of the port, the probe tip should extend into the header approximately 3/8″.
  • If entering on the bottom side of the port, the probe tip should extend into the header approximately 3/4-1″.
  • DO NOT cut the probe to length, you will ruin the probe as the sensor is at the very end of the probe.

EGT probes are designed to be bent to fit your application using a standard tubing bender. The material is Inconel and doesn’t kink very easily, they can be hand bent if care is used.

Even though the probe appears to be very long in our pictures after they are bent for the application they will appear more like what you are used to seeing on race cars. The nut that holds the probe into the header slides down the tubing to the correct distance for your application. When tightened, the tube nut compresses a sleeve that seals the probe in the header, similar to a tubing compression olive.